package Demo02;

public class Main {

}


class SingletonLazy {
    private volatile static SingletonLazy instance = null;

    public static SingletonLazy getInstance() {
        if (instance == null) {
            synchronized (SingletonLazy.class) {
                if (instance == null) {
                    instance = new SingletonLazy();
                }
            }
        }
        return instance;
    }


    private SingletonLazy() {
    }
}